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302 



REVIEW OF AMERICAN BIRDS. 



[part I. 



(34,026?) Albino. (35.049.) Type of PetrocAeticion iiUorea. (155.) Type of speclei. 



Hirundo albiventris. 



Hirundo albiventrts, Bonn. 1782 (Bdfp. PI. enl. 546, 2, Cayenne). — Pelro- 

 a' chelidon alb. Sclatkr, Catal. 1861, 41, no. 247. 



V Hirundo leucoptera, Qm. S. N. II, 1788, 1022 (based on PI. enl. as above). 



'i. ,w i — Cab. Schomb. Quiana, III, 672. — Petrochelidon leuc, Cah. Mus. 

 ^,5;,,,, ,, Hein. I, 48.— Coti/le leuc. Bukm. Uebers. Ill, 1856, 143 (Brazil).— 

 Ib. Reise La Plata, II, 1861, 478 (Banda Oriental). 



Bill very large ; tail much emarginated. Above glossy metallic greenish- 

 blue on the head, more bluish-green on the back. Rump white (but not tail 

 coverts, wliich are like the back) all round, as also entire under parts, in- 

 cluding inside of wings. Outer edges of the inner secondaries 'nd inner 

 great coverts, most of inner webs of lateral tail feathers and portion 



of feathers of whole back, hind neck, and forehead also white. 1.. ace of an 

 interrupted pectoral collar, except concealed basal gray across the breast, 

 darkest in a median spot. Only occasional and almost inappreciable dusky 

 shaft streaks. Feathers of chin and throat entirely white, those of the crissum 

 with the extreme root only plumbeous. -jrr, .^ • 1 , 



Young birds appear to have more white on the wings. 



(No. 35,056.) Total length, 5.40 ; wing, 4.20 ; tail, 2.25 ; fork, .34 ; difference 

 between quills, 2.10; length of bill from forehead, .50, from nostril, .27, along 

 gape, .68; width of gape, .50; tarsus, .44; middle toe and claw, .60, claw 

 alone, .19 ; hind toe and claw, .36, claw alone, .19. 



P. meyeni^ (leucopyga, Meyen, nee Licht.) I have not seen, though 

 it is said to be closely allied, but to diflFer in a steel blue back, a 

 grayish band across the breast, and the absence of white edges to 

 the wing feathers, thus probably more like leucorrhoa, but without 

 the white loral line, and with a decided grayish pectoral band. 



' Hirundo xneyeni (leucopyga). 



Hirundo leucopyga, Meyen, Nova acta Ac. L. C. XVI, II, 1834, snppl. 



73, pi. X (Chile). — Co/y* leu. Bdrm. Uebers. Ill, 1856, 144.- 



Hirundo leucopygia, Gould, Birds Beagle, 1841, 40 (Valparaiso and 



Tierra del Fuego). 

 Petrochelidon meyeni, Cab. Mus. Hein. I, 1850, 48. — Sclatek, Catal. 



1861, 40, no. 246.— Cassin, Catal. Hir. 1853. 



Hah. Coast of Chile and Patagonia. 



Note. — If leucopyga, as used by Lichtenstein for 77. leucorrhoa, be merely a 

 museum name, as appears probable, it should stand for the present species. 



